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Normalized Modeling of Piezoelectric Energy Harvester Based on Equivalence Transformation and Unit-Less Parameters

机译:基于等效变换和单位损失参数的压电能量采集器归一化建模

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摘要

Micro-electromechanical systems are ubiquitous in several energy harvesting solutions and can be used in applications such as bio-implantable devices and wireless micro-sensors. Piezoelectricity is an interesting key to perform the interface between environmental extracted energy and the power delivered to the load due to the use of mechanical vibration and resonance features. However, it is necessary for a detailed analysis in order to obtain an accurate understanding of the system. In this regard, some works deal with the normalization procedures to analyze the piezoelectric component behavior based on the mechanical resonance frequency. In order to enhance the system modeling, the electromechanical resonance frequency must also be analyzed. This paper deals with an approach to model the piezoelectric component that allows analyzing several unitless parameters that are critical to improve the performance of the system. In addition, a state-space model for the piezo-harvester based on the Class-E resonant rectifier is presented. Some experimental results are shown to validate the theoretical approach.
机译:微机电系统在几种能量收集解决方案中无处不在,并可用于诸如生物可植入设备和无线微传感器之类的应用中。由于使用了机械振动和共振特性,压电是实现环境提取的能量与传递给负载的功率之间的接口的有趣关键。但是,为了获得对系统的准确了解,有必要进行详细分析。在这方面,一些工作涉及归一化程序,以基于机械共振频率来分析压电组件的行为。为了增强系统建模,还必须分析机电共振频率。本文介绍了一种对压电元件建模的方法,该方法可以分析几个无单元参数,这些参数对于提高系统性能至关重要。此外,提出了基于E类谐振整流器的压电收割器的状态空间模型。一些实验结果表明可以验证该理论方法。

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